Rock chemistry and fluid inclusion studies as exploration tools for ore deposits in the Sila batholith, southern Italy
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Abstract
The Sila batholith is the focus of an extensive petrogenetic research program, which includes an assessment of its potential to host granite-related ore deposits. Univariate and multivariate statistical techniques were applied to major- and minor-element rock geochemical data. The analysis indicates that the highest potential for mineralization occurs in corundum-normative, peraluminous, unfoliated, relatively late-stage plutons. The plutons are enriched in Rb, Nb, Ta and U, but depleted in Fe, Mg and Sr. The K/Rb, Ba/Rb, Rb/Sr and Rb3/Ba·Sr·K indices and high R-factor scores of Si-K-Rb are typical of mineralized granitic rocks.
A reconnaissance fluid inclusion study indicates that the sub-solidus rock was infiltrated by solutions of widely different temperatures (50–416°C) and variable salinities (0 to ∼26 wt.% NaCl equivalent). The higher-temperature solutions probably represent granite or magmatic-related Hercynian fluids, whereas the lower-temperature fluids may be either Hercynian or Alpine in age. Fluids with characteristics typical of mineralized “porphyry” systems have not been recognized.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Rock chemistry and fluid inclusion studies as exploration tools for ore deposits in the Sila batholith, southern Italy |
| Series title | Journal of Geochemical Exploration |
| DOI | 10.1016/0375-6742(91)90044-U |
| Volume | 40 |
| Issue | 1-3 |
| Year Published | 1991 |
| Language | English |
| Publisher | Elsevier |
| Description | 20 p. |
| First page | 291 |
| Last page | 310 |
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